Belgium's national football team player Jan Vertonghen speaks during a press conference at the Wembley Stadium in Wembley, North London, England, on June 1, 2012, ahead of a friendly football match against England on June 2 (credit: OLLY GREENWOOD/AFP/GettyImages)

Arsenal are on alert as Jan Vertonghen's move to Tottenham is reportedly in danger of falling through.

Vertonghen is keen on securing a move to Tottenham this summer and recently stated that Spurs were his "favourite" of the clubs interested in securing his signature.

According to reports in the Netherlands on Monday, the Belgium international is entitled to a 15 per cent cut of any transfer fee that Tottenham will pay for Ajax for his services.

But according to Dutch newspaper De Telegraaf, Ajax are unwilling to pay the 25-year-old his cut, which has thrown a spanner in the works.

At time of writing, it remains unknown why the Dutch giants are unwilling to make the payment.

Should the deal fall through, Vertonghen is likely to continue playing in Amsterdam next season unless the Gunners make a renewed attempt to sign the centre-back.

Should Arsene Wenger decide against making a bid, or should Vertonghen reject the chance to move to Emirates Stadium, then he would be available on a free transfer in twelve months time when his contract expires.

Dani Alves, who has been linked with several Premier League clubs including Chelsea, Liverpool and Manchester United, is "sad" that Barcelona are yet to offer him a new contract, according to the defender's agent.